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Manipal MET2016PhysicsDual Nature of Matter

What will be the kinetic energy of an electron having de-Broglie wavelength 2 Å ?

Options

  1. A37.5 eV
  2. B75 eV
  3. C150 eV
  4. D300 eV

Correct answer

A. 37.5 eV

Step-by-step solution

The de-Broglie wavelength associated with electron _ = 1.227 V ~nm aligned V & = (12.27)^2 _e^2 10⁻² & = 150 _e^2 10⁻² aligned V= 150 (0.2)^2 = 150 10⁻² 4 10⁻² E= V eV =37.5 eV

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